#goToTopBox {
  position: fixed;
  right: 1.3rem;
  bottom: 6.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  text-decoration: none;
  opacity: 0;
  border: 1px solid #999;
  border-radius: 50%;
  background-color: #fff;
  -webkit-tap-highlight-color: transparent;
  transition: all .3s;
  .goToTopIcon {
    display: block;
    width: 1.7rem;
    height: 1.7rem;
    fill: #999;
  }
}

.linear-hide {
  opacity: 0;
  visibility: hidden;
}

.linear-show {
  opacity: 1 !important;
}